package com.ulwx.tool.path;

import com.ulwx.tool.Assert;

import java.lang.reflect.Array;
import java.util.*;
abstract class PObjectUtils {

   private static final int INITIAL_HASH = 7;
   private static final int MULTIPLIER = 31;

   private static final String EMPTY_STRING = "";
   private static final String NULL_STRING = "null";
   private static final String ARRAY_START = "{";
   private static final String ARRAY_END = "}";
   private static final String EMPTY_ARRAY = ARRAY_START + ARRAY_END;
   private static final String ARRAY_ELEMENT_SEPARATOR = ", ";
   private static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];


   /**
    * Return whether the given throwable is a checked exception:
    * that is, neither a RuntimeException nor an Error.
    * @param ex the throwable to check
    * @return whether the throwable is a checked exception
    * @see Exception
    * @see RuntimeException
    * @see Error
    */
   public static boolean isCheckedException(Throwable ex) {
       return !(ex instanceof RuntimeException || ex instanceof Error);
   }

   /**
    * Check whether the given exception is compatible with the specified
    * exception types, as declared in a throws clause.
    * @param ex the exception to check
    * @param declaredExceptions the exception types declared in the throws clause
    * @return whether the given exception is compatible
    */
   public static boolean isCompatibleWithThrowsClause(Throwable ex,  Class<?>... declaredExceptions) {
       if (!isCheckedException(ex)) {
           return true;
       }
       if (declaredExceptions != null) {
           for (Class<?> declaredException : declaredExceptions) {
               if (declaredException.isInstance(ex)) {
                   return true;
               }
           }
       }
       return false;
   }

   /**
    * Determine whether the given object is an array:
    * either an Object array or a primitive array.
    * @param obj the object to check
    */
   public static boolean isArray( Object obj) {
       return (obj != null && obj.getClass().isArray());
   }

   /**
    * Determine whether the given array is empty:
    * i.e. {@code null} or of zero length.
    * @param array the array to check
    * @see #isEmpty(Object)
    */
   public static boolean isEmpty( Object[] array) {
       return (array == null || array.length == 0);
   }

   /**
    * Determine whether the given object is empty.
    * <p>This method supports the following object types.
    * <ul>
    * <li>{@code Optional}: considered empty if {@link Optional#empty()}</li>
    * <li>{@code Array}: considered empty if its length is zero</li>
    * <li>{@link CharSequence}: considered empty if its length is zero</li>
    * <li>{@link Collection}: delegates to {@link Collection#isEmpty()}</li>
    * <li>{@link Map}: delegates to {@link Map#isEmpty()}</li>
    * </ul>
    * <p>If the given object is non-null and not one of the aforementioned
    * supported types, this method returns {@code false}.
    * @param obj the object to check
    * @return {@code true} if the object is {@code null} or <em>empty</em>
    * @since 4.2
    */
   public static boolean isEmpty( Object obj) {
       if (obj == null) {
           return true;
       }

       if (obj instanceof Optional) {
           return !((Optional<?>) obj).isPresent();
       }
       if (obj instanceof CharSequence) {
           return ((CharSequence) obj).length() == 0;
       }
       if (obj.getClass().isArray()) {
           return Array.getLength(obj) == 0;
       }
       if (obj instanceof Collection) {
           return ((Collection<?>) obj).isEmpty();
       }
       if (obj instanceof Map) {
           return ((Map<?, ?>) obj).isEmpty();
       }

       // else
       return false;
   }

   /**
    * Unwrap the given object which is potentially a {@link Optional}.
    * @param obj the candidate object
    * @return either the value held within the {@code Optional}, {@code null}
    * if the {@code Optional} is empty, or simply the given object as-is
    * @since 5.0
    */

   public static Object unwrapOptional( Object obj) {
       if (obj instanceof Optional) {
           Optional<?> optional = (Optional<?>) obj;
           if (!optional.isPresent()) {
               return null;
           }
           Object result = optional.get();
           Assert.isTrue(!(result instanceof Optional), "Multi-level Optional usage not supported");
           return result;
       }
       return obj;
   }

   /**
    * Check whether the given array contains the given element.
    * @param array the array to check (may be {@code null},
    * in which case the return value will always be {@code false})
    * @param element the element to check for
    * @return whether the element has been found in the given array
    */
   public static boolean containsElement( Object[] array, Object element) {
       if (array == null) {
           return false;
       }
       for (Object arrayEle : array) {
           if (nullSafeEquals(arrayEle, element)) {
               return true;
           }
       }
       return false;
   }

   /**
    * Check whether the given array of enum constants contains a constant with the given name,
    * ignoring case when determining a match.
    * @param enumValues the enum values to check, typically obtained via {@code MyEnum.values()}
    * @param constant the constant name to find (must not be null or empty string)
    * @return whether the constant has been found in the given array
    */
   public static boolean containsConstant(Enum<?>[] enumValues, String constant) {
       return containsConstant(enumValues, constant, false);
   }

   /**
    * Check whether the given array of enum constants contains a constant with the given name.
    * @param enumValues the enum values to check, typically obtained via {@code MyEnum.values()}
    * @param constant the constant name to find (must not be null or empty string)
    * @param caseSensitive whether case is significant in determining a match
    * @return whether the constant has been found in the given array
    */
   public static boolean containsConstant(Enum<?>[] enumValues, String constant, boolean caseSensitive) {
       for (Enum<?> candidate : enumValues) {
           if (caseSensitive ? candidate.toString().equals(constant) :
                   candidate.toString().equalsIgnoreCase(constant)) {
               return true;
           }
       }
       return false;
   }

   /**
    * Case insensitive alternative to {@link Enum#valueOf(Class, String)}.
    * @param <E> the concrete Enum type
    * @param enumValues the array of all Enum constants in question, usually per {@code Enum.values()}
    * @param constant the constant to get the enum value of
    * @throws IllegalArgumentException if the given constant is not found in the given array
    * of enum values. Use {@link #containsConstant(Enum[], String)} as a guard to avoid this exception.
    */
   public static <E extends Enum<?>> E caseInsensitiveValueOf(E[] enumValues, String constant) {
       for (E candidate : enumValues) {
           if (candidate.toString().equalsIgnoreCase(constant)) {
               return candidate;
           }
       }
       throw new IllegalArgumentException("Constant [" + constant + "] does not exist in enum type " +
               enumValues.getClass().getComponentType().getName());
   }

   /**
    * Append the given object to the given array, returning a new array
    * consisting of the input array contents plus the given object.
    * @param array the array to append to (can be {@code null})
    * @param obj the object to append
    * @return the new array (of the same component type; never {@code null})
    */
   public static <A, O extends A> A[] addObjectToArray( A[] array,  O obj) {
       Class<?> compType = Object.class;
       if (array != null) {
           compType = array.getClass().getComponentType();
       }
       else if (obj != null) {
           compType = obj.getClass();
       }
       int newArrLength = (array != null ? array.length + 1 : 1);
       @SuppressWarnings("unchecked")
       A[] newArr = (A[]) Array.newInstance(compType, newArrLength);
       if (array != null) {
           System.arraycopy(array, 0, newArr, 0, array.length);
       }
       newArr[newArr.length - 1] = obj;
       return newArr;
   }

   /**
    * Convert the given array (which may be a primitive array) to an
    * object array (if necessary of primitive wrapper objects).
    * <p>A {@code null} source value will be converted to an
    * empty Object array.
    * @param source the (potentially primitive) array
    * @return the corresponding object array (never {@code null})
    * @throws IllegalArgumentException if the parameter is not an array
    */
   public static Object[] toObjectArray( Object source) {
       if (source instanceof Object[]) {
           return (Object[]) source;
       }
       if (source == null) {
           return EMPTY_OBJECT_ARRAY;
       }
       if (!source.getClass().isArray()) {
           throw new IllegalArgumentException("Source is not an array: " + source);
       }
       int length = Array.getLength(source);
       if (length == 0) {
           return EMPTY_OBJECT_ARRAY;
       }
       Class<?> wrapperType = Array.get(source, 0).getClass();
       Object[] newArray = (Object[]) Array.newInstance(wrapperType, length);
       for (int i = 0; i < length; i++) {
           newArray[i] = Array.get(source, i);
       }
       return newArray;
   }


   //---------------------------------------------------------------------
   // Convenience methods for content-based equality/hash-code handling
   //---------------------------------------------------------------------

   /**
    * Determine if the given objects are equal, returning {@code true} if
    * both are {@code null} or {@code false} if only one is {@code null}.
    * <p>Compares arrays with {@code Arrays.equals}, performing an equality
    * check based on the array elements rather than the array reference.
    * @param o1 first Object to compare
    * @param o2 second Object to compare
    * @return whether the given objects are equal
    * @see Object#equals(Object)
    * @see Arrays#equals
    */
   public static boolean nullSafeEquals( Object o1,  Object o2) {
       if (o1 == o2) {
           return true;
       }
       if (o1 == null || o2 == null) {
           return false;
       }
       if (o1.equals(o2)) {
           return true;
       }
       if (o1.getClass().isArray() && o2.getClass().isArray()) {
           return arrayEquals(o1, o2);
       }
       return false;
   }

   /**
    * Compare the given arrays with {@code Arrays.equals}, performing an equality
    * check based on the array elements rather than the array reference.
    * @param o1 first array to compare
    * @param o2 second array to compare
    * @return whether the given objects are equal
    * @see #nullSafeEquals(Object, Object)
    * @see Arrays#equals
    */
   private static boolean arrayEquals(Object o1, Object o2) {
       if (o1 instanceof Object[] && o2 instanceof Object[]) {
           return Arrays.equals((Object[]) o1, (Object[]) o2);
       }
       if (o1 instanceof boolean[] && o2 instanceof boolean[]) {
           return Arrays.equals((boolean[]) o1, (boolean[]) o2);
       }
       if (o1 instanceof byte[] && o2 instanceof byte[]) {
           return Arrays.equals((byte[]) o1, (byte[]) o2);
       }
       if (o1 instanceof char[] && o2 instanceof char[]) {
           return Arrays.equals((char[]) o1, (char[]) o2);
       }
       if (o1 instanceof double[] && o2 instanceof double[]) {
           return Arrays.equals((double[]) o1, (double[]) o2);
       }
       if (o1 instanceof float[] && o2 instanceof float[]) {
           return Arrays.equals((float[]) o1, (float[]) o2);
       }
       if (o1 instanceof int[] && o2 instanceof int[]) {
           return Arrays.equals((int[]) o1, (int[]) o2);
       }
       if (o1 instanceof long[] && o2 instanceof long[]) {
           return Arrays.equals((long[]) o1, (long[]) o2);
       }
       if (o1 instanceof short[] && o2 instanceof short[]) {
           return Arrays.equals((short[]) o1, (short[]) o2);
       }
       return false;
   }

   /**
    * Return as hash code for the given object; typically the value of
    * {@code Object#hashCode()}}. If the object is an array,
    * this method will delegate to any of the {@code nullSafeHashCode}
    * methods for arrays in this class. If the object is {@code null},
    * this method returns 0.
    * @see Object#hashCode()
    * @see #nullSafeHashCode(Object[])
    * @see #nullSafeHashCode(boolean[])
    * @see #nullSafeHashCode(byte[])
    * @see #nullSafeHashCode(char[])
    * @see #nullSafeHashCode(double[])
    * @see #nullSafeHashCode(float[])
    * @see #nullSafeHashCode(int[])
    * @see #nullSafeHashCode(long[])
    * @see #nullSafeHashCode(short[])
    */
   public static int nullSafeHashCode( Object obj) {
       if (obj == null) {
           return 0;
       }
       if (obj.getClass().isArray()) {
           if (obj instanceof Object[]) {
               return nullSafeHashCode((Object[]) obj);
           }
           if (obj instanceof boolean[]) {
               return nullSafeHashCode((boolean[]) obj);
           }
           if (obj instanceof byte[]) {
               return nullSafeHashCode((byte[]) obj);
           }
           if (obj instanceof char[]) {
               return nullSafeHashCode((char[]) obj);
           }
           if (obj instanceof double[]) {
               return nullSafeHashCode((double[]) obj);
           }
           if (obj instanceof float[]) {
               return nullSafeHashCode((float[]) obj);
           }
           if (obj instanceof int[]) {
               return nullSafeHashCode((int[]) obj);
           }
           if (obj instanceof long[]) {
               return nullSafeHashCode((long[]) obj);
           }
           if (obj instanceof short[]) {
               return nullSafeHashCode((short[]) obj);
           }
       }
       return obj.hashCode();
   }

   /**
    * Return a hash code based on the contents of the specified array.
    * If {@code array} is {@code null}, this method returns 0.
    */
   public static int nullSafeHashCode( Object[] array) {
       if (array == null) {
           return 0;
       }
       int hash = INITIAL_HASH;
       for (Object element : array) {
           hash = MULTIPLIER * hash + nullSafeHashCode(element);
       }
       return hash;
   }

   /**
    * Return a hash code based on the contents of the specified array.
    * If {@code array} is {@code null}, this method returns 0.
    */
   public static int nullSafeHashCode( boolean[] array) {
       if (array == null) {
           return 0;
       }
       int hash = INITIAL_HASH;
       for (boolean element : array) {
           hash = MULTIPLIER * hash + Boolean.hashCode(element);
       }
       return hash;
   }

   /**
    * Return a hash code based on the contents of the specified array.
    * If {@code array} is {@code null}, this method returns 0.
    */
   public static int nullSafeHashCode( byte[] array) {
       if (array == null) {
           return 0;
       }
       int hash = INITIAL_HASH;
       for (byte element : array) {
           hash = MULTIPLIER * hash + element;
       }
       return hash;
   }

   /**
    * Return a hash code based on the contents of the specified array.
    * If {@code array} is {@code null}, this method returns 0.
    */
   public static int nullSafeHashCode( char[] array) {
       if (array == null) {
           return 0;
       }
       int hash = INITIAL_HASH;
       for (char element : array) {
           hash = MULTIPLIER * hash + element;
       }
       return hash;
   }

   /**
    * Return a hash code based on the contents of the specified array.
    * If {@code array} is {@code null}, this method returns 0.
    */
   public static int nullSafeHashCode( double[] array) {
       if (array == null) {
           return 0;
       }
       int hash = INITIAL_HASH;
       for (double element : array) {
           hash = MULTIPLIER * hash + Double.hashCode(element);
       }
       return hash;
   }

   /**
    * Return a hash code based on the contents of the specified array.
    * If {@code array} is {@code null}, this method returns 0.
    */
   public static int nullSafeHashCode( float[] array) {
       if (array == null) {
           return 0;
       }
       int hash = INITIAL_HASH;
       for (float element : array) {
           hash = MULTIPLIER * hash + Float.hashCode(element);
       }
       return hash;
   }

   /**
    * Return a hash code based on the contents of the specified array.
    * If {@code array} is {@code null}, this method returns 0.
    */
   public static int nullSafeHashCode( int[] array) {
       if (array == null) {
           return 0;
       }
       int hash = INITIAL_HASH;
       for (int element : array) {
           hash = MULTIPLIER * hash + element;
       }
       return hash;
   }

   /**
    * Return a hash code based on the contents of the specified array.
    * If {@code array} is {@code null}, this method returns 0.
    */
   public static int nullSafeHashCode( long[] array) {
       if (array == null) {
           return 0;
       }
       int hash = INITIAL_HASH;
       for (long element : array) {
           hash = MULTIPLIER * hash + Long.hashCode(element);
       }
       return hash;
   }

   /**
    * Return a hash code based on the contents of the specified array.
    * If {@code array} is {@code null}, this method returns 0.
    */
   public static int nullSafeHashCode( short[] array) {
       if (array == null) {
           return 0;
       }
       int hash = INITIAL_HASH;
       for (short element : array) {
           hash = MULTIPLIER * hash + element;
       }
       return hash;
   }

   /**
    * Return the same value as {@link Boolean#hashCode(boolean)}}.
    * @deprecated as of Spring Framework 5.0, in favor of the native JDK 8 variant
    */
   @Deprecated
   public static int hashCode(boolean bool) {
       return Boolean.hashCode(bool);
   }

   /**
    * Return the same value as {@link Double#hashCode(double)}}.
    * @deprecated as of Spring Framework 5.0, in favor of the native JDK 8 variant
    */
   @Deprecated
   public static int hashCode(double dbl) {
       return Double.hashCode(dbl);
   }

   /**
    * Return the same value as {@link Float#hashCode(float)}}.
    * @deprecated as of Spring Framework 5.0, in favor of the native JDK 8 variant
    */
   @Deprecated
   public static int hashCode(float flt) {
       return Float.hashCode(flt);
   }

   /**
    * Return the same value as {@link Long#hashCode(long)}}.
    * @deprecated as of Spring Framework 5.0, in favor of the native JDK 8 variant
    */
   @Deprecated
   public static int hashCode(long lng) {
       return Long.hashCode(lng);
   }


   //---------------------------------------------------------------------
   // Convenience methods for toString output
   //---------------------------------------------------------------------

   /**
    * Return a String representation of an object's overall identity.
    * @param obj the object (may be {@code null})
    * @return the object's identity as String representation,
    * or an empty String if the object was {@code null}
    */
   public static String identityToString( Object obj) {
       if (obj == null) {
           return EMPTY_STRING;
       }
       return obj.getClass().getName() + "@" + getIdentityHexString(obj);
   }

   /**
    * Return a hex String form of an object's identity hash code.
    * @param obj the object
    * @return the object's identity code in hex notation
    */
   public static String getIdentityHexString(Object obj) {
       return Integer.toHexString(System.identityHashCode(obj));
   }

   /**
    * Return a content-based String representation if {@code obj} is
    * not {@code null}; otherwise returns an empty String.
    * <p>Differs from {@link #nullSafeToString(Object)} in that it returns
    * an empty String rather than "null" for a {@code null} value.
    * @param obj the object to build a display String for
    * @return a display String representation of {@code obj}
    * @see #nullSafeToString(Object)
    */
   public static String getDisplayString( Object obj) {
       if (obj == null) {
           return EMPTY_STRING;
       }
       return nullSafeToString(obj);
   }

   /**
    * Determine the class name for the given object.
    * <p>Returns a {@code "null"} String if {@code obj} is {@code null}.
    * @param obj the object to introspect (may be {@code null})
    * @return the corresponding class name
    */
   public static String nullSafeClassName( Object obj) {
       return (obj != null ? obj.getClass().getName() : NULL_STRING);
   }

   /**
    * Return a String representation of the specified Object.
    * <p>Builds a String representation of the contents in case of an array.
    * Returns a {@code "null"} String if {@code obj} is {@code null}.
    * @param obj the object to build a String representation for
    * @return a String representation of {@code obj}
    */
   public static String nullSafeToString( Object obj) {
       if (obj == null) {
           return NULL_STRING;
       }
       if (obj instanceof String) {
           return (String) obj;
       }
       if (obj instanceof Object[]) {
           return nullSafeToString((Object[]) obj);
       }
       if (obj instanceof boolean[]) {
           return nullSafeToString((boolean[]) obj);
       }
       if (obj instanceof byte[]) {
           return nullSafeToString((byte[]) obj);
       }
       if (obj instanceof char[]) {
           return nullSafeToString((char[]) obj);
       }
       if (obj instanceof double[]) {
           return nullSafeToString((double[]) obj);
       }
       if (obj instanceof float[]) {
           return nullSafeToString((float[]) obj);
       }
       if (obj instanceof int[]) {
           return nullSafeToString((int[]) obj);
       }
       if (obj instanceof long[]) {
           return nullSafeToString((long[]) obj);
       }
       if (obj instanceof short[]) {
           return nullSafeToString((short[]) obj);
       }
       String str = obj.toString();
       return (str != null ? str : EMPTY_STRING);
   }

   /**
    * Return a String representation of the contents of the specified array.
    * <p>The String representation consists of a list of the array's elements,
    * enclosed in curly braces ({@code "{}"}). Adjacent elements are separated
    * by the characters {@code ", "} (a comma followed by a space).
    * Returns a {@code "null"} String if {@code array} is {@code null}.
    * @param array the array to build a String representation for
    * @return a String representation of {@code array}
    */
   public static String nullSafeToString( Object[] array) {
       if (array == null) {
           return NULL_STRING;
       }
       int length = array.length;
       if (length == 0) {
           return EMPTY_ARRAY;
       }
       StringJoiner stringJoiner = new StringJoiner(ARRAY_ELEMENT_SEPARATOR, ARRAY_START, ARRAY_END);
       for (Object o : array) {
           stringJoiner.add(String.valueOf(o));
       }
       return stringJoiner.toString();
   }

   /**
    * Return a String representation of the contents of the specified array.
    * <p>The String representation consists of a list of the array's elements,
    * enclosed in curly braces ({@code "{}"}). Adjacent elements are separated
    * by the characters {@code ", "} (a comma followed by a space).
    * Returns a {@code "null"} String if {@code array} is {@code null}.
    * @param array the array to build a String representation for
    * @return a String representation of {@code array}
    */
   public static String nullSafeToString( boolean[] array) {
       if (array == null) {
           return NULL_STRING;
       }
       int length = array.length;
       if (length == 0) {
           return EMPTY_ARRAY;
       }
       StringJoiner stringJoiner = new StringJoiner(ARRAY_ELEMENT_SEPARATOR, ARRAY_START, ARRAY_END);
       for (boolean b : array) {
           stringJoiner.add(String.valueOf(b));
       }
       return stringJoiner.toString();
   }

   /**
    * Return a String representation of the contents of the specified array.
    * <p>The String representation consists of a list of the array's elements,
    * enclosed in curly braces ({@code "{}"}). Adjacent elements are separated
    * by the characters {@code ", "} (a comma followed by a space).
    * Returns a {@code "null"} String if {@code array} is {@code null}.
    * @param array the array to build a String representation for
    * @return a String representation of {@code array}
    */
   public static String nullSafeToString( byte[] array) {
       if (array == null) {
           return NULL_STRING;
       }
       int length = array.length;
       if (length == 0) {
           return EMPTY_ARRAY;
       }
       StringJoiner stringJoiner = new StringJoiner(ARRAY_ELEMENT_SEPARATOR, ARRAY_START, ARRAY_END);
       for (byte b : array) {
           stringJoiner.add(String.valueOf(b));
       }
       return stringJoiner.toString();
   }

   /**
    * Return a String representation of the contents of the specified array.
    * <p>The String representation consists of a list of the array's elements,
    * enclosed in curly braces ({@code "{}"}). Adjacent elements are separated
    * by the characters {@code ", "} (a comma followed by a space).
    * Returns a {@code "null"} String if {@code array} is {@code null}.
    * @param array the array to build a String representation for
    * @return a String representation of {@code array}
    */
   public static String nullSafeToString( char[] array) {
       if (array == null) {
           return NULL_STRING;
       }
       int length = array.length;
       if (length == 0) {
           return EMPTY_ARRAY;
       }
       StringJoiner stringJoiner = new StringJoiner(ARRAY_ELEMENT_SEPARATOR, ARRAY_START, ARRAY_END);
       for (char c : array) {
           stringJoiner.add('\'' + String.valueOf(c) + '\'');
       }
       return stringJoiner.toString();
   }

   /**
    * Return a String representation of the contents of the specified array.
    * <p>The String representation consists of a list of the array's elements,
    * enclosed in curly braces ({@code "{}"}). Adjacent elements are separated
    * by the characters {@code ", "} (a comma followed by a space).
    * Returns a {@code "null"} String if {@code array} is {@code null}.
    * @param array the array to build a String representation for
    * @return a String representation of {@code array}
    */
   public static String nullSafeToString( double[] array) {
       if (array == null) {
           return NULL_STRING;
       }
       int length = array.length;
       if (length == 0) {
           return EMPTY_ARRAY;
       }
       StringJoiner stringJoiner = new StringJoiner(ARRAY_ELEMENT_SEPARATOR, ARRAY_START, ARRAY_END);
       for (double d : array) {
           stringJoiner.add(String.valueOf(d));
       }
       return stringJoiner.toString();
   }

   /**
    * Return a String representation of the contents of the specified array.
    * <p>The String representation consists of a list of the array's elements,
    * enclosed in curly braces ({@code "{}"}). Adjacent elements are separated
    * by the characters {@code ", "} (a comma followed by a space).
    * Returns a {@code "null"} String if {@code array} is {@code null}.
    * @param array the array to build a String representation for
    * @return a String representation of {@code array}
    */
   public static String nullSafeToString( float[] array) {
       if (array == null) {
           return NULL_STRING;
       }
       int length = array.length;
       if (length == 0) {
           return EMPTY_ARRAY;
       }
       StringJoiner stringJoiner = new StringJoiner(ARRAY_ELEMENT_SEPARATOR, ARRAY_START, ARRAY_END);
       for (float f : array) {
           stringJoiner.add(String.valueOf(f));
       }
       return stringJoiner.toString();
   }

   /**
    * Return a String representation of the contents of the specified array.
    * <p>The String representation consists of a list of the array's elements,
    * enclosed in curly braces ({@code "{}"}). Adjacent elements are separated
    * by the characters {@code ", "} (a comma followed by a space).
    * Returns a {@code "null"} String if {@code array} is {@code null}.
    * @param array the array to build a String representation for
    * @return a String representation of {@code array}
    */
   public static String nullSafeToString( int[] array) {
       if (array == null) {
           return NULL_STRING;
       }
       int length = array.length;
       if (length == 0) {
           return EMPTY_ARRAY;
       }
       StringJoiner stringJoiner = new StringJoiner(ARRAY_ELEMENT_SEPARATOR, ARRAY_START, ARRAY_END);
       for (int i : array) {
           stringJoiner.add(String.valueOf(i));
       }
       return stringJoiner.toString();
   }

   /**
    * Return a String representation of the contents of the specified array.
    * <p>The String representation consists of a list of the array's elements,
    * enclosed in curly braces ({@code "{}"}). Adjacent elements are separated
    * by the characters {@code ", "} (a comma followed by a space).
    * Returns a {@code "null"} String if {@code array} is {@code null}.
    * @param array the array to build a String representation for
    * @return a String representation of {@code array}
    */
   public static String nullSafeToString( long[] array) {
       if (array == null) {
           return NULL_STRING;
       }
       int length = array.length;
       if (length == 0) {
           return EMPTY_ARRAY;
       }
       StringJoiner stringJoiner = new StringJoiner(ARRAY_ELEMENT_SEPARATOR, ARRAY_START, ARRAY_END);
       for (long l : array) {
           stringJoiner.add(String.valueOf(l));
       }
       return stringJoiner.toString();
   }

   /**
    * Return a String representation of the contents of the specified array.
    * <p>The String representation consists of a list of the array's elements,
    * enclosed in curly braces ({@code "{}"}). Adjacent elements are separated
    * by the characters {@code ", "} (a comma followed by a space).
    * Returns a {@code "null"} String if {@code array} is {@code null}.
    * @param array the array to build a String representation for
    * @return a String representation of {@code array}
    */
   public static String nullSafeToString( short[] array) {
       if (array == null) {
           return NULL_STRING;
       }
       int length = array.length;
       if (length == 0) {
           return EMPTY_ARRAY;
       }
       StringJoiner stringJoiner = new StringJoiner(ARRAY_ELEMENT_SEPARATOR, ARRAY_START, ARRAY_END);
       for (short s : array) {
           stringJoiner.add(String.valueOf(s));
       }
       return stringJoiner.toString();
   }

}
